Australia hopes for carbon capturing 'sponges'
Australian scientists said Monday they are working to develop "molecular sponges" that they hope will soak up carbon gases and help in the fight to contain greenhouse gas pollution.
Researchers at Sydney University have produced crystals full of minute holes which can retain gases such as carbon dioxide, and which they hope could be used in places where these gases are produced, such as power stations.
"You could think of them a little bit like your kitchen sponge," lead researcher and postdoctoral fellow Deanna D'Alessandra told ABC Radio.
The chemical frameworks are full of so many tiny holes or pores that they have a far greater surface area than would be expected from their size, she said.
"So if you thought of all of the area inside of the little pores of the sponge, then in fact it would add up to an incredible amount.
"So in fact if you took a teaspoon of one of the best materials we have at the moment, then it would actually have a surface area of about a rugby field, which is pretty amazing," she said.
D'Alessandro said the "sponges" currently in development are more robust than previous ones, and could potentially withstand the high temperatures in power stations.
The process of soaking the "molecular sponges" with carbon dioxide could also be reversible, allowing the gas to be released under certain conditions, she said.
The scientists say their findings are not yet ready for commercial adaptation, but D'Alessandro said she hopes they will become viable.
(c) 2010 AFP
